/* ===== CSS Variables ===== */
:root {
    /* LINE Brand Colors */
    --line-green: #06C755;
    --line-green-dark: #05A847;
    --line-green-light: #07E060;

    /* Modern Color Palette */
    --primary: #6366F1;
    --primary-dark: #4F46E5;
    --primary-light: #818CF8;
    --secondary: #EC4899;
    --secondary-dark: #DB2777;
    --success: var(--line-green);
    --success-dark: var(--line-green-dark);
    --warning: #F59E0B;
    --danger: #EF4444;

    /* Neutrals */
    --bg-primary: #0F0F1E;
    --bg-secondary: #1A1A2E;
    --bg-tertiary: #252538;
    --bg-elevated: #2D2D44;
    --border: rgba(255, 255, 255, 0.1);
    --text-primary: #FFFFFF;
    --text-secondary: #A0A0B8;
    --text-tertiary: #6B6B8A;

    /* Effects */
    --glow-primary: 0 0 20px rgba(99, 102, 241, 0.3);
    --glow-success: 0 0 20px rgba(6, 199, 85, 0.3);
    --shadow-sm: 0 2px 8px rgba(0, 0, 0, 0.3);
    --shadow-md: 0 4px 16px rgba(0, 0, 0, 0.4);
    --shadow-lg: 0 8px 32px rgba(0, 0, 0, 0.5);

    /* Spacing */
    --spacing-xs: 0.5rem;
    --spacing-sm: 0.75rem;
    --spacing-md: 1rem;
    --spacing-lg: 1.5rem;
    --spacing-xl: 2rem;

    /* Border Radius */
    --radius-sm: 8px;
    --radius-md: 12px;
    --radius-lg: 16px;
    --radius-xl: 24px;

    /* Transitions */
    --transition-fast: 0.15s ease;
    --transition-base: 0.3s ease;
    --transition-slow: 0.5s ease;
}

/* ===== Reset & Base ===== */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

body {
    font-family: 'Noto Sans JP', 'Poppins', -apple-system, BlinkMacSystemFont, sans-serif;
    background: linear-gradient(135deg, #0F0F1E 0%, #1A1A2E 50%, #0F0F1E 100%);
    color: var(--text-primary);
    min-height: 100vh;
    overflow-x: hidden;
}

/* ===== Container ===== */
.container {
    max-width: 1600px;
    margin: 0 auto;
    padding: var(--spacing-lg);
}

/* ===== Header ===== */
.header {
    background: var(--bg-secondary);
    border: 1px solid var(--border);
    border-radius: var(--radius-lg);
    padding: var(--spacing-lg) var(--spacing-xl);
    margin-bottom: var(--spacing-xl);
    display: flex;
    justify-content: space-between;
    align-items: center;
    box-shadow: var(--shadow-md);
    position: relative;
    overflow: hidden;
}



.logo {
    display: flex;
    align-items: center;
    gap: var(--spacing-md);
}

.logo-icon {
    width: 48px;
    height: 48px;
    color: var(--success);
    filter: drop-shadow(var(--glow-success));
    animation: pulse 2s ease-in-out infinite;
}

@keyframes pulse {

    0%,
    100% {
        transform: scale(1);
    }

    50% {
        transform: scale(1.05);
    }
}

.logo h1 {
    font-family: 'Poppins', sans-serif;
    font-size: 1.75rem;
    font-weight: 800;
    background: linear-gradient(135deg, var(--success), var(--primary));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.header-stats {
    display: flex;
    gap: var(--spacing-lg);
}

.stat-item {
    display: flex;
    flex-direction: column;
    align-items: flex-end;
    gap: 4px;
}

.stat-label {
    font-size: 0.75rem;
    color: var(--text-tertiary);
    text-transform: uppercase;
    letter-spacing: 0.05em;
}

.stat-value {
    font-size: 1.5rem;
    font-weight: 700;
    color: var(--success);
    text-shadow: var(--glow-success);
}

/* ===== Main Content ===== */
.main-content {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: var(--spacing-xl);
}

/* ===== Panel Styles ===== */
.editor-panel,
.collection-panel {
    background: var(--bg-secondary);
    border: 1px solid var(--border);
    border-radius: var(--radius-lg);
    padding: var(--spacing-xl);
    box-shadow: var(--shadow-md);
}

.panel-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: var(--spacing-lg);
    padding-bottom: var(--spacing-md);
    border-bottom: 1px solid var(--border);
}

.panel-header h2 {
    font-size: 1.25rem;
    font-weight: 700;
    color: var(--text-primary);
}

.collection-actions {
    display: flex;
    gap: var(--spacing-sm);
}

/* ===== Canvas ===== */
.canvas-container {
    position: relative;
    width: 100%;
    aspect-ratio: 370 / 320;
    background: var(--bg-tertiary);
    border: 2px dashed var(--border);
    border-radius: var(--radius-md);
    overflow: hidden;
    margin-bottom: var(--spacing-lg);
    transition: all var(--transition-base);
}

/* Checkerboard pattern for transparency */
.canvas-container.transparent-mode {
    background-image:
        linear-gradient(45deg, #1f1f33 25%, transparent 25%),
        linear-gradient(-45deg, #1f1f33 25%, transparent 25%),
        linear-gradient(45deg, transparent 75%, #1f1f33 75%),
        linear-gradient(-45deg, transparent 75%, #1f1f33 75%);
    background-size: 20px 20px;
    background-position: 0 0, 0 10px, 10px -10px, -10px 0px;
    background-color: #252538;
    /* dark base matching bg-tertiary */
}

#mainCanvas {
    width: 100%;
    height: 100%;
    display: block;
}

.canvas-overlay {
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    background: rgba(15, 15, 30, 0.8);
    backdrop-filter: blur(10px);
    transition: opacity var(--transition-base);
    pointer-events: auto;
    cursor: pointer;
}

.canvas-overlay.hidden {
    opacity: 0;
    pointer-events: none;
}

.upload-icon {
    width: 64px;
    height: 64px;
    color: var(--primary);
    margin-bottom: var(--spacing-md);
    animation: bounce 2s ease-in-out infinite;
}

@keyframes bounce {

    0%,
    100% {
        transform: translateY(0);
    }

    50% {
        transform: translateY(-10px);
    }
}

.canvas-overlay p {
    color: var(--text-secondary);
    text-align: center;
    line-height: 1.6;
}

/* ===== Tools Section ===== */
.tools-section {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-lg);
}

.tool-group {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-sm);
}

.tool-label {
    font-size: 0.875rem;
    font-weight: 600;
    color: var(--text-secondary);
    text-transform: uppercase;
    letter-spacing: 0.05em;
}

/* ===== Input Styles ===== */
.input-group {
    display: flex;
    gap: var(--spacing-sm);
}

input[type="text"] {
    flex: 1;
    background: var(--bg-tertiary);
    border: 1px solid var(--border);
    border-radius: var(--radius-sm);
    padding: var(--spacing-sm) var(--spacing-md);
    color: var(--text-primary);
    font-size: 0.875rem;
    transition: all var(--transition-fast);
}

input[type="text"]:focus {
    outline: none;
    border-color: var(--primary);
    box-shadow: var(--glow-primary);
}

input[type="color"] {
    width: 48px;
    height: 48px;
    border: 2px solid var(--border);
    border-radius: var(--radius-sm);
    background: var(--bg-tertiary);
    cursor: pointer;
    transition: all var(--transition-fast);
}

input[type="color"]:hover {
    border-color: var(--primary);
    transform: scale(1.05);
}

input[type="range"] {
    flex: 1;
    height: 6px;
    border-radius: 3px;
    background: var(--bg-tertiary);
    outline: none;
    appearance: none;
    -webkit-appearance: none;
}

input[type="range"]::-webkit-slider-thumb {
    -webkit-appearance: none;
    width: 20px;
    height: 20px;
    border-radius: 50%;
    background: var(--primary);
    cursor: pointer;
    box-shadow: var(--glow-primary);
    transition: all var(--transition-fast);
}

input[type="range"]::-webkit-slider-thumb:hover {
    transform: scale(1.2);
}

select {
    background: var(--bg-tertiary);
    border: 1px solid var(--border);
    border-radius: var(--radius-sm);
    padding: var(--spacing-sm) var(--spacing-md);
    color: var(--text-primary);
    font-size: 0.875rem;
    cursor: pointer;
    transition: all var(--transition-fast);
}

select:focus {
    outline: none;
    border-color: var(--primary);
}

/* ===== Style Controls ===== */
.style-controls {
    display: flex;
    gap: var(--spacing-sm);
    align-items: center;
}

.size-label {
    font-size: 0.875rem;
    color: var(--text-secondary);
    min-width: 50px;
}

.control-sublabel {
    font-size: 0.75rem;
    color: var(--text-tertiary);
    min-width: 60px;
}

.hint-text {
    font-size: 0.75rem;
    color: var(--text-tertiary);
    margin-top: var(--spacing-xs);
    padding: var(--spacing-xs) var(--spacing-sm);
    background: rgba(99, 102, 241, 0.1);
    border-left: 2px solid var(--primary);
    border-radius: 4px;
}

/* ===== Effects Grid ===== */
.effects-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: var(--spacing-sm);
}

.effect-btn {
    background: var(--bg-tertiary);
    border: 1px solid var(--border);
    border-radius: var(--radius-sm);
    padding: var(--spacing-sm);
    color: var(--text-primary);
    font-size: 0.875rem;
    cursor: pointer;
    transition: all var(--transition-fast);
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 4px;
}

.effect-btn:hover {
    background: var(--bg-elevated);
    border-color: var(--primary);
    transform: translateY(-2px);
    box-shadow: var(--shadow-sm);
}

.effect-btn:active {
    transform: translateY(0);
}

/* ===== Background Controls ===== */
.bg-controls {
    display: flex;
    gap: var(--spacing-sm);
}

/* ===== Buttons ===== */
button {
    font-family: inherit;
    font-weight: 600;
    border: none;
    cursor: pointer;
    transition: all var(--transition-fast);
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: var(--spacing-sm);
}

.btn-primary {
    background: linear-gradient(135deg, var(--primary), var(--primary-dark));
    color: white;
    padding: var(--spacing-sm) var(--spacing-lg);
    border-radius: var(--radius-sm);
    box-shadow: var(--shadow-sm);
}

.btn-primary:hover {
    transform: translateY(-2px);
    box-shadow: var(--glow-primary), var(--shadow-md);
}

.btn-secondary {
    background: var(--bg-tertiary);
    border: 1px solid var(--border);
    color: var(--text-primary);
    padding: var(--spacing-sm) var(--spacing-lg);
    border-radius: var(--radius-sm);
}

.btn-secondary:hover {
    background: var(--bg-elevated);
    border-color: var(--primary);
    transform: translateY(-2px);
}

.btn-success {
    background: linear-gradient(135deg, var(--success), var(--success-dark));
    color: white;
    padding: var(--spacing-sm) var(--spacing-lg);
    border-radius: var(--radius-sm);
    box-shadow: var(--shadow-sm);
}

.btn-success:hover {
    transform: translateY(-2px);
    box-shadow: var(--glow-success), var(--shadow-md);
}

.btn-icon {
    background: var(--bg-tertiary);
    border: 1px solid var(--border);
    color: var(--text-secondary);
    width: 40px;
    height: 40px;
    border-radius: var(--radius-sm);
    padding: 8px;
}

.btn-icon:hover {
    background: var(--bg-elevated);
    color: var(--text-primary);
    border-color: var(--primary);
    transform: scale(1.05);
}

.btn-icon svg {
    width: 100%;
    height: 100%;
}

button svg {
    width: 20px;
    height: 20px;
}

/* ===== Action Buttons ===== */
.action-buttons {
    display: flex;
    gap: var(--spacing-sm);
    margin-top: var(--spacing-md);
}

.action-buttons button {
    flex: 1;
}

/* ===== Sticker Grid ===== */
.sticker-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(150px, 1fr));
    gap: var(--spacing-md);
    margin-bottom: var(--spacing-lg);
    min-height: 400px;
}

.sticker-item {
    position: relative;
    aspect-ratio: 370 / 320;
    background: var(--bg-tertiary);
    border: 1px solid var(--border);
    border-radius: var(--radius-md);
    overflow: hidden;
    cursor: pointer;
    transition: all var(--transition-base);
}

.sticker-item:hover {
    border-color: var(--primary);
    transform: translateY(-4px);
    box-shadow: var(--glow-primary), var(--shadow-lg);
}

.sticker-item img {
    width: 100%;
    height: 100%;
    object-fit: contain;
}

.sticker-item .delete-btn {
    position: absolute;
    top: 8px;
    right: 8px;
    width: 32px;
    height: 32px;
    background: rgba(239, 68, 68, 0.9);
    border: none;
    border-radius: 50%;
    color: white;
    opacity: 0;
    transition: all var(--transition-fast);
    padding: 6px;
    z-index: 10;
}

.sticker-item .delete-btn svg {
    pointer-events: none;
}

.sticker-item:hover .delete-btn {
    opacity: 1;
}

.sticker-item .delete-btn:hover {
    background: var(--danger);
    transform: scale(1.1);
}

/* ===== Empty State ===== */
.empty-state {
    grid-column: 1 / -1;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    padding: var(--spacing-xl);
    color: var(--text-tertiary);
}

.empty-icon {
    width: 80px;
    height: 80px;
    color: var(--text-tertiary);
    opacity: 0.5;
    margin-bottom: var(--spacing-md);
}

.empty-state p {
    margin: var(--spacing-xs) 0;
}

.empty-hint {
    font-size: 0.875rem;
    color: var(--text-tertiary);
}

/* ===== Guidelines ===== */
.guidelines {
    background: var(--bg-tertiary);
    border: 1px solid var(--border);
    border-radius: var(--radius-md);
    padding: var(--spacing-lg);
}

.guidelines h3 {
    font-size: 1rem;
    margin-bottom: var(--spacing-md);
    color: var(--text-primary);
}

.guidelines ul {
    list-style: none;
    display: flex;
    flex-direction: column;
    gap: var(--spacing-sm);
}

.guidelines li {
    font-size: 0.875rem;
    color: var(--text-secondary);
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
}

/* ===== Responsive ===== */

/* Tablet (iPad) - 768px to 1024px */
@media (max-width: 1024px) and (min-width: 768px) {
    .container {
        padding: var(--spacing-md);
    }

    .main-content {
        grid-template-columns: 1fr 1fr;
        gap: var(--spacing-md);
    }

    /* Larger touch targets for iPad */
    button {
        min-height: 44px;
        font-size: 0.9rem;
    }

    .btn-icon {
        width: 44px;
        height: 44px;
    }

    .effect-btn {
        padding: var(--spacing-md);
        font-size: 0.9rem;
    }

    /* Optimize effects grid for iPad */
    .effects-grid {
        grid-template-columns: repeat(4, 1fr);
        gap: var(--spacing-md);
    }

    /* Better sticker grid for iPad */
    .sticker-grid {
        grid-template-columns: repeat(auto-fill, minmax(140px, 1fr));
    }

    /* Adjust input controls */
    input[type="range"] {
        height: 8px;
    }

    input[type="range"]::-webkit-slider-thumb {
        width: 24px;
        height: 24px;
    }

    input[type="color"] {
        width: 56px;
        height: 56px;
    }
}

/* Tablet Portrait & Mobile - Below 768px */
@media (max-width: 767px) {
    .container {
        padding: var(--spacing-sm);
    }

    .header {
        flex-direction: column;
        gap: var(--spacing-md);
        text-align: center;
        padding: var(--spacing-md);
    }

    .logo {
        flex-direction: column;
    }

    .logo h1 {
        font-size: 1.5rem;
    }

    .main-content {
        grid-template-columns: 1fr;
        gap: var(--spacing-md);
    }

    /* Larger touch targets for mobile */
    button {
        min-height: 48px;
        font-size: 1rem;
        padding: var(--spacing-md) var(--spacing-lg);
    }

    .btn-icon {
        width: 48px;
        height: 48px;
    }

    .effect-btn {
        padding: var(--spacing-md);
        font-size: 1rem;
    }

    /* Mobile-friendly effects grid */
    .effects-grid {
        grid-template-columns: repeat(3, 1fr);
        gap: var(--spacing-sm);
    }

    /* Mobile-friendly sticker grid */
    .sticker-grid {
        grid-template-columns: repeat(auto-fill, minmax(100px, 1fr));
        gap: var(--spacing-sm);
    }

    /* Adjust tool groups for mobile */
    .tool-group {
        gap: var(--spacing-md);
    }

    .grid-2-cols,
    .grid-3-cols {
        grid-template-columns: 1fr;
        gap: var(--spacing-sm);
    }

    /* Better input controls for touch */
    input[type="range"] {
        height: 10px;
    }

    input[type="range"]::-webkit-slider-thumb {
        width: 28px;
        height: 28px;
    }

    input[type="color"] {
        width: 60px;
        height: 60px;
    }

    input[type="text"] {
        font-size: 16px;
        /* Prevents zoom on iOS */
        padding: var(--spacing-md);
    }

    select {
        font-size: 16px;
        padding: var(--spacing-md);
    }
}

/* ===== Animations ===== */
@keyframes fadeIn {
    from {
        opacity: 0;
        transform: translateY(10px);
    }

    to {
        opacity: 1;
        transform: translateY(0);
    }
}

.sticker-item {
    animation: fadeIn var(--transition-base);
}

/* ===== Modal Styles ===== */
.modal {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: rgba(15, 15, 30, 0.9);
    backdrop-filter: blur(5px);
    display: flex;
    justify-content: center;
    align-items: center;
    z-index: 1000;
    opacity: 1;
    transition: opacity var(--transition-base);
}

.modal.hidden {
    opacity: 0;
    pointer-events: none;
    visibility: hidden;
}

.modal-content {
    background: var(--bg-secondary);
    border: 1px solid var(--border);
    border-radius: var(--radius-lg);
    width: 90%;
    max-width: 800px;
    display: flex;
    flex-direction: column;
    box-shadow: var(--shadow-lg);
    overflow: hidden;
}

.modal-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: var(--spacing-md) var(--spacing-xl);
    border-bottom: 1px solid var(--border);
    background: var(--bg-tertiary);
}

.modal-header h3 {
    font-size: 1.125rem;
    font-weight: 700;
}

.crop-container {
    height: 60vh;
    padding: var(--spacing-md);
    background: #000;
    display: flex;
    justify-content: center;
    align-items: center;
    overflow: hidden;
}

#cropImage {
    display: block;
    max-width: 100%;
    max-height: 100%;
}

.modal-footer {
    display: flex;
    justify-content: flex-end;
    gap: var(--spacing-md);
    padding: var(--spacing-md) var(--spacing-xl);
    border-top: 1px solid var(--border);
    background: var(--bg-tertiary);
}

/* Tool Actions */
.tool-actions {
    margin-bottom: var(--spacing-md);
    padding-bottom: var(--spacing-sm);
    border-bottom: 1px dashed var(--border);
}

.full-width {
    width: 100%;
    justify-content: center;
    gap: 8px;
}

/* Utilities */
.grid-2-cols {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: var(--spacing-sm);
}

.grid-3-cols {
    display: grid;
    grid-template-columns: 1fr 1fr 1fr;
    gap: var(--spacing-sm);
}

.space-between {
    justify-content: space-between;
    width: 100%;
}

.footer-actions {
    display: flex;
    gap: var(--spacing-md);
}

.bg-checkerboard {
    background-image:
        linear-gradient(45deg, #1f1f33 25%, transparent 25%),
        linear-gradient(-45deg, #1f1f33 25%, transparent 25%),
        linear-gradient(45deg, transparent 75%, #1f1f33 75%),
        linear-gradient(-45deg, transparent 75%, #1f1f33 75%);
    background-size: 20px 20px;
    background-position: 0 0, 0 10px, 10px -10px, -10px 0px;
    background-color: #252538;
}

#freeHandCanvas {
    cursor: crosshair;
    max-width: 100%;
    max-height: 100%;
    display: block;
}

/* Danger Button */
.btn-danger {
    background: linear-gradient(135deg, #ff4d4d 0%, #cc0000 100%);
    color: white;
    border: none;
    padding: var(--spacing-sm) var(--spacing-lg);
    border-radius: var(--radius-md);
    font-weight: 600;
    cursor: pointer;
    transition: all var(--transition-base);
}

.btn-danger:hover {
    transform: translateY(-2px);
    box-shadow: 0 4px 12px rgba(255, 77, 77, 0.4);
}

.btn-group {
    display: flex;
    align-items: center;
}